Removing dried grout from your mosaic is a difficult and messy process. Having done this a few times I'd recommend spending more time on the grouting process.
Australia's BEST Online Mosaic Craft & Art Supplier | Massive Range of Craft Mosaic Tiles & Supplies | Flat $10 Postage in Australia | 100% Money Back Guarantee.
Removing dried grout from your mosaic is a difficult and messy process. Having done this a few times I'd recommend spending more time on the grouting process and trying to get it right the first time.
How To Grout A Mosaic – I C Mosaics
HOW TO GROUT A MOSAIC A step by step guide to grouting mosaics
How to grout your mosaic
How to make mosaics: the tile adhesive method (or the thin set method)
How to Remove Dried Grout or Mortar from Tile
How to Grout Glass on Glass Mosaics - Made By Barb - finished art
How to Install Mosaic Tile
Mosaic How To Clean Off Grout – I C Mosaics
How to Clean Grout Off Your Mosaic Art Work
The Versace Mansion - Mosaic Art Showcase